ont-wheel drive is standard, with all-wheel drive an option.Without a third-row seat, the Terrain might strike some family shoppers as less useful, but we've found the Terrain quite comfortable, even for four adults. GM has carved out good space inside a tidy package, and fitted the Terrain with very comfortable front bucket seats and a rear bench with enough support.The rear seat slides over an eight-inch span so passengers or cargo can get higher priority, and the seats fold to boost storage up to 31.6 cubic feet. However, the Terrain's cargo floor is high for its class, and the seats don't fold completely flat. All versions have a big, deep glove box, a storage bin over the center stack of controls, and an armrest storage bin deep enough to hold a small laptop. Wind and powertrain noise are admirably low in the six-cylinder models, but four-cylinders have noticeable drivetrain whirs and ticks--one of the classic soundtracks to today's direct-injection engines is a ticking as fuel is delivered, and it's pretty evident here, though the four-cylinder gets a noise-cancellation system that's meant to cut down on perceived cabin noise. Excellent safety scores are part of the Terrain profile. The NHTSA gives it four stars overall, while the IIHS calls it a Top Safety Pick. Along with curtain airbags and stability control, a rearview camera is standard--and necessary, since the Terrain's styling creates big blind spots. Denali models have standard blind-spot monitors with cross-traffic alerts. All Terrains come with standard climate control; AM/FM/XM/CD sound with a USB port for media players; keyless entry; a power driver seat; and ambient lighting. Newly standard is a touchscreen-driven audio system that will also be able to connect music apps on smartphones to the car's audio system, enabling Bluetooth voice control and streaming music from sources like Pandora. Options include remote start; Bluetooth; a rear-seat DVD entertainment system; and a navigation system with hard-drive map and music storage.